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| eins | hi | 08:04 |
|---|---|---|
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| dobee | j1m: is it ok for you if i add zcml slugs for registering the ICollator adapter to zope.ucol, additionally i will fix the adapter which passes the locale id which is a unicode to the Collator but the Collator wants a string | 11:18 |
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| roym | Thought I had a good handle on adapters and registration, but | 16:57 |
| roym | am baffled by why the first form succeeds, and not the second. | 16:57 |
| roym | How would I debug this further? | 16:57 |
| roym | 16:57 | |
| roym | (Pdb) zapi.getAdapter(pdf, IPDFObject) | 16:57 |
| roym | *** ComponentLookupError: | 16:57 |
| roym | (<general.PDFObject object at 0x408b93ac>, <InterfaceClass | 16:57 |
| roym | interfaces.IPDFObject>, u'') | 16:57 |
| roym | 16:57 | |
| roym | (Pdb) IPDFObject(pdf) | 16:57 |
| roym | <general.PDFObject object at 0x408b93ac> | 16:57 |
| roym | sorry - I meant the first fails and the second succeeds. | 16:58 |
| philiKON | roym, zapi.getAdapter((pdf,), IPDFObject) | 17:02 |
| roym | ah! thanks. | 17:03 |
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| roym | hmm, that didn't work.. | 17:05 |
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| roym | same error: (Pdb) zapi.getAdapter((pdf,), IPDFObject) | 17:06 |
| roym | *** ComponentLookupError: ((<general.PDFObject object at | 17:06 |
| roym | 0x408b93ac>,), <InterfaceClass interfaces.IPDFObject>, u'') | 17:06 |
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| roym | tuple(providedBy(pdf)) | 17:08 |
| roym | (<InterfaceClass interfaces.IPDFObject>, <InterfaceClass persistent.interfaces.IPersistent>) | 17:08 |
| ignas | roym: duh, IPDFObject is not adapting anything | 17:12 |
| ignas | it is plainly returning the object i think | 17:12 |
| ignas | there is not such adapter registered, probably | 17:13 |
| ignas | or i am talking nonsense again ;) | 17:13 |
| ignas | getAdapter is a different thing from IFoo(object) | 17:14 |
| * mgedmin reads IRC logs | 17:14 | |
| mgedmin | roym: there are two different adapter mechanisms | 17:14 |
| roym | Isn't IPDFObject(pdf) supposed to be syntactic sugar for getAdapter? | 17:15 |
| ignas | roym: nope, it is more like IPDFObject(pdf) checks whether pdf already implements IPDF, if not looks for __conform__ and only then looks for adapters | 17:16 |
| mgedmin | there was a PEP 246 about including adapters into core Python | 17:16 |
| mgedmin | it was, apparently, rejected | 17:16 |
| mgedmin | but Zope 3 wanted to support that PEP and introduced the shorthand notation of IFoo(obj) | 17:17 |
| mgedmin | that also checks for __conform__ | 17:17 |
| mgedmin | and then falls back to getAdapter | 17:17 |
| mgedmin | as a result IFoo(obj) is a more powerful adaptation mechanism | 17:17 |
| mgedmin | but it doesn't support multiadapters or subscription adapters | 17:17 |
| roym | guys, thanks for the clarification. | 17:18 |
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| mgedmin | it was very surprising to me once | 17:29 |
| mgedmin | but Jim said that's how it was supposed to be | 17:30 |
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| SteveA | mgedmin: we'd make IFoo(...) do multi-adaption if there was a clean API for it | 17:41 |
| SteveA | but we also need to support default values | 17:41 |
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| mgedmin | IFoo((x, y, z), barf) | 17:43 |
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| mgedmin | IFoo((x, y, z), name='gargle', default=barf) | 17:43 |
| SteveA | yes, but then say goodbye to adapting tuples, unless you already know they're tuples | 17:46 |
| SteveA | IFoo(x) | 17:46 |
| SteveA | if x is a tuple, you can't adapt it how you expect to | 17:47 |
| mgedmin | IFoo((x, ))? | 17:53 |
| mgedmin | it's about the same as the % operator on strings | 17:53 |
| mgedmin | you cannot reliably do "foo is %s" % foo | 17:53 |
| mgedmin | if foo could possibly be a tuple | 17:53 |
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| regebro | Huh. Why is IBrowserPublisher sometimes called as a single adapter and sometimes as a multi-adapter? | 18:32 |
| regebro | I guess this in one of the traversal refactorings j1m was talking about. :) | 18:32 |
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| regebro | Hey, mkerrin! Howsit hanging? :) | 20:42 |
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| j1m | I have a problem and I'd love to get some other folks optinions on it. | 20:56 |
| j1m | I'm testing my branch against an existing application. | 20:56 |
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| j1m | I have found lots of missing backward-compatibility that I've been dealing with. | 20:57 |
| j1m | Two things have been particularly vexing. | 20:57 |
| j1m | 1. Event reprs changed. Lots of tests depend on event reprs. For now, I'm gonna try and work around this | 20:57 |
| j1m | by making the reprs the same as they were beforem, even if this means making them lie about their modules. | 20:58 |
| j1m | 2. We are now generating events that we didn't generate previously. | 20:59 |
| j1m | I think both of these would be helped by better testing support in the future. | 20:59 |
| j1m | I'm at a loss to decide what do do for issue 2 now though. | 20:59 |
| SteveA | when you're testing events, you're generally only interested in a particular category of events | 21:01 |
| SteveA | and if an application raises other events, well that's fine, so long as they are outside the category you're interested in | 21:01 |
| SteveA | so, a test that checks to see all events raised for an operation is a fragile test | 21:02 |
| j1m | Yes. We have lots of those. | 21:02 |
| SteveA | there should be a standard piece of infrastructure (a categorized event channel...) to capture events from a category to help people writing tests | 21:02 |
| SteveA | in the interim, it hurts | 21:02 |
| j1m | I've encouraged that style I'm afraid. | 21:02 |
| SteveA | sure, all my event tests are like that too | 21:03 |
| SteveA | it ought to be fixable in one place per test | 21:03 |
| j1m | Do you think we should let these tests fail then? | 21:04 |
| j1m | yes | 21:04 |
| SteveA | by making the test fixture event gatherer subscribe to a channel rather than all events | 21:04 |
| SteveA | i'm very -1 on failing tests on the trunk | 21:04 |
| SteveA | want help on a field day to fix them up? | 21:04 |
| j1m | I wouldn't fail trunk tests, but I'd likely cause 3rd-party tests to fail. | 21:04 |
| j1m | All tests are passing on my branch. | 21:05 |
| SteveA | i don't think that's so bad | 21:05 |
| SteveA | that's an inevitable part of improving this kind of thing | 21:05 |
| SteveA | i think the improvement is worth it | 21:05 |
| j1m | In this case, the new events are dou to the fact that registration events are generated by the global component registry as well as the local ones. | 21:07 |
| j1m | due | 21:07 |
| j1m | A hack would be to arrange that we don't get the events if you go through the convenience functions, component.provideAdapter, ... etc. | 21:08 |
| j1m | These might be deprecated in the future anyway. | 21:08 |
| j1m | ditto for the similat ztapi functions. | 21:09 |
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| philiKON | j1m, i think it's ok making people update their tests. the option you suggest would be quite hairy.... | 21:18 |
| j1m | Well, I just tried it. It was simple to implement and seems to work. :) | 21:18 |
| j1m | I'm inclined to try hard not to break tests. | 21:19 |
| philiKON | ok | 21:19 |
| j1m | However, we need to come up with a way to make event tests less brittle. | 21:19 |
| j1m | But we can do this in the next release cycle. | 21:19 |
| philiKON | yes. even tfilterting is so easy, after all... it's usually just laziness | 21:19 |
| j1m | I'm feeling a lot of urgwncy to get this branch merged. | 21:19 |
| j1m | urgency | 21:20 |
| philiKON | yes, especially because we need its being merged so that zope 2 and five can follow | 21:20 |
| philiKON | by the way, how do you want to communicate that it is deprecated that the convenience functions won't throw events? | 21:20 |
| j1m | I'm afraid we're going t have to slip the freez date again. | 21:20 |
| j1m | I'll have to think about it. | 21:21 |
| philiKON | do you have an estimate on when your branch might be mergable | 21:21 |
| philiKON | ? | 21:21 |
| j1m | I think we may want to encourage a style that doesn't use the convenience functions. | 21:21 |
| j1m | Not sure. Maybe today. | 21:21 |
| philiKON | cool | 21:21 |
| j1m | But that would require things going a lot better the rest of the day than they've gone the last 2 days. :) | 21:22 |
| philiKON | or we might provide different convenience functions | 21:22 |
| philiKON | provide -> register perhaps | 21:22 |
| philiKON | these might ahve different semantics | 21:22 |
| philiKON | these being the new functions | 21:22 |
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| j1m | anyway, I'm going with te hack for now. | 21:24 |
| philiKON | ok :) | 21:27 |
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